Lock



J. H. SHAW Oct. 21

LOCK

2 Sheets-Sheet. 1

Filed Dec. 22 1919 a rm J. H. SHAW LOCK Filed Dec. 22 1919 2 Sheets-Sheet 2 INVENTOR M H BY aATTORNEY Fatented Get. 21, 1924.

1,512,368 PATENT OFFICE.

JOHN H. SHAW, OF NEW HAVEN, CONNECTICUT, ASSIGNORTO SARGENT & COMPANY, OF NEW HAVEN, CONNECTICUT, A CORPORATION OF CONNECTICUT LOCK.

Application filed December 22, 1919. Srial No. 346,481.

To all whom it may concern: I

Be it known that I, JOHN H. SHAW, a citizen of the United States, residingin New Haven, in the county of New Haven and State ofGonnecticut, have invented certain new and useful Improvements in Locks, of which the following is a full, clear, and exact description.

'10 nism, and. more particularly to locking mechanism 'for the type of door which is provided with an escutcheon plate having a mail. receiving passage formed therethrough.

Heretofore door locks have been provided with relatively large escutcheon plates in which mail receiving slots are formed, so that the escutcheon plate in addition to its usual function serves also as a guard plate forthe mail slot in the door. This arrangement is open tothe objection that after the door has been locked,. it is comparatively easy to open the same without a key by inserting an instrument through the mail slot formedin theescut cheon plate to operate the knob or other lock mechanism upon the inside of the door.

The primary object of my invention, therefore, is to prevent the type of door having a mail slot formed through its escutcheon plate from being successfully attacked in the manner above indicated.

A more specific object of my invention is to. provide'the mail slot of the escutcheon plate witha protecting flap and to provide means operated by thisfla-p for preventing the opening of the door while this flap is 0 en. 1

To these and other ends the invention con sists inthe novel features and combinations of parts to be hereinafter described and claimed; 3 v

In the accompanying drawings: Fig. '1 is a fragmentary side view of a door having my invention applied thereto.

Fig.2 is a front edge view of Fig.1. Fig. 3 is a vertical sectional view taken on theline' 33 of Fig. 2 looking in the direction of the arrows and showing the flap for the mail slot open.

Fig. 4 is a View similar to Fig. 3, butshowingthe mail flap closed; and

Fig. 5 .is a sectional view taken substantially the direction of the arrows.-

on the line 5- 5 of Fig. 3 looking in: g

' 1 member 29 to the sl1dingbolt'28. Thebell In the drawings, I have'designated by the numeral 10 the portion of a door having my invention applied thereto. Within the front. edge of this door is mounted in the usual manner a mortise lock designated in its entirety by the numeral 11, and this mortise lock is provided with an outside escutcheon I plate12 and an inside escutcheon plate 13 se-f This invention relates to locking mechacured to the door 10 by the screws 14. These escutcheon plates are made rather large and extend downwardbelow the, mortise lock 11 a suflicient distance to have a mail receiving slot formed through the same below the H101"? tise lock, in alignment with a corresponding opening 10' formed through the door. In the'embodiment of my invention illustrated, I have shown the outside escutcheon plate 12, asprovided witha hingedflap 15 swingingly mounted upon the innerfface ofthis escutcheon plate and positioned to close'the mail slot formed in the same. The escutcheon plate 12 is preferably provided with the inwardly projecting lu s 16 positioned to have the lugs 17 upon t e flap15 pivotally secured thereto by the pivot pin-18, andthe flap is normallyheld in its closed position. as shown in Figs. 1 and 2 by a coiled spring 19. l

In order to'preve-nt the bolt jcontrolling mechanism upon the insideof the door from being operated to unlock'the door by insert: ing an instrument through the letter slot, I have provided the mortise lock 11 with the mechanism controlled bythe flap 15, which I 'will now describe. The mortise lock 11, may be provided with the usual or any pre-.

ferred mechanism, such as. for example the H usual spring operated latch bolt 20', the dog controlling plunger 21, which is provided to operate the latch dogging lever 22,1and. the latch bolt 20 is shown as provided with the usualretracting yoke 23 operated by the knob operated hub, 2 1. and in order that the latch bolt may be provided with keyfcone" trolled means for retracting the same, I have shown the'usual relatively long pivotedlever 25, which is operated by the rollback 26 of a cylinder lock 27 In addition to the mechanism, just described, within the mortise lock 11, I have provided therein a separate and independent sliding bolt 28, which is operated by a vertically sliding member 29, a pivoted bell crank lever 30 preferably being provided to operatively connect the crank lever is pivoted upon the fixed post 31 and'one arm of this bell crank is shown as provided with a pin 32 operatively received in the elongated opening 33 formed in the bolt 28 adjacent the rear end of the same. The-other arm of the bell crank may be similarly connected to the vertically sliding member 29, and the bolt 28 is normally held in its retracted position by a coiled spring 34 positioned about the post 31 and having one end reacting against an armof the bell'orank lever torock the same. The vertically sliding member 29 is provided with a lower end projecting through the bottom ofthe mortise locklcasing and this lower end is preferably provided with a horizontally extending foot 35. in order to provide means for raising the member 29 by the opening'o fthe flap 15', I have provided the rocking member 36,. which is pivotally se cured to the inner face of the escntcheon plate 1 2, this plate being provided with the lines in Fig. 2 and this in turn will permit the sliding member 29 to move downward to '.the position shown in Fig. at, as the bolt 28 is retracted by its operating spring 34. Sincethe rockingmember 36 normally lies below the upper edge of the hinged flap 15, it will be seen that whenever this flap is forced op en,;the upper edge of the same cooperates with the pivoted member 36 to swing the same upward to the position shown in Fig. 5, whereupon the cam member 36 which operatively engages'the foot 35 forces the sliding member 29 upward, and this member in turn moves the sliding bolt 28 to its projected position.

From the foregoing description, when read in connection with the drawings, it will be seen that whenever the flap 15 is opened, the auxiliary bolt 28 will be moved to its extendedposition by the operating slide29 j and pivoted member 36, so-that if an instrument is. inserted through the letter slot by an unauthorized person attempting to open the door in this manner, even if he succeeds in retracting the latch bolt 20', he will not be able to open the door, since the auxiliary bolt28 will remain protracted so'long as the letter flap is held open. If for any reason the coiled spring 34 should fail to retract itsbolt 28 afterthe flap 15 lHLSIbGQII ClOSQCl,

changes may be made, in the device herein disclosed without departing from the scope of my invention, as defined in the annexed claims. 7

What I claim is i 1. Locking mechanism comprising, an escutcheon plate having a passage therethrough, a protectinghfiap for closing said passage, a normally retracted bolt, and

means operated by said flap to project said bolt from the lock by the opening of said Locking mechanism comprising, an escutcheon plate having a passage therethrough, a protecting flap normally closing said passage, a bolt, and means operable by saidflap to project Said bolt from the look by the opening of said flap.

3. Locking mechanism comprising, an escutcheon plate having a. mailreceiving passage therethrough, a protecting flap normally closing said passage, a bolt, and means operable by said flap to project said bolt from the look by the opening of sa.i d flap.

4. Locking mechanism Qomprising,.an es? cutcheon plate having a passage therethrough, a protecting flap therefor, a latch bolt, and a second bolt. provided with means to project the same from th-e lock by the opening of said flap.

5. Locking mechanism comprising, an escutcheon plate having a passage therethrough, a protecting flap therefor, a latch bolt, and a second bolt provided with means to project the same by theopening oat-said flap, said second bolt provided with key operable meansfor retracting the same.

6, In combination with a door, amortise locl; mounted therein, an escutcheon plate for said lock having a mail slot formed, therethrough, a protecting flap forclosing said mail slot, and a bolt within said lock provided witlrnieans forprojecting the same from the lock by opening said flap. I

7. in combination with a door, a mortise lock mounted therein, an escutcheon plate for said lock having a mail slot therethrongh, a protecting flap for said slot, and locking means normally within'said-lock bnt projectabie therefrom by saidqflap to prevent'the opening of said door while said fiapis open.

3. In combination witha doorgan escutcheon plate having a mail slot therethrou'gh, a protecting flap for said slot, andmeans operable by said flap for lockingsaid door.

9. Locking mechanism for a doorhaving a Ihave-provided a projection 39 upon the passage therethrou-gh comprising a latch door by the movement of said closure member.

11. Looking mechanism for a door having a passage the-rethrough comprising a closure member for said passage and a lock having a locking member projectable into locking po-' sition by the movement of said closure member.

12. In combination a door having an opening therein through which articles may be inserted, and a lock having a bolt projected into locking position by the insertion of an article into said opening.

13. In combination with a door having a passage therethrough and a projecting flap for said passage, a cam member hinged above said flap and a bolt projected by said cam member to prevent the opening of said door when said flap is open.

14. In combination, a'door having a: passage therethrough, a protecting closure member normally closing said passage, a

lock having a projectable bolt, means operable by the spring of the closure member to project the bolt from the lock, and key operated means to retract the bolt to unlock'the door.

15. In combination, a door having an opening therethrough, a closure member normally closing the opening, a lock having a bolt projectable into locking position, means connecting said member to the bolt whereby the bolt isprojeoted when the member is opened, and

a key operated member acting upon I said means operabl to retract the bolt.

In witness whereof, I have hereunto set my hand on the 18th day of December, 1919.

a V JOHN H. SHAW. 

